{"id":102381,"date":"2022-10-12T12:23:11","date_gmt":"2022-10-12T12:23:11","guid":{"rendered":"http:\/\/ahay.org\/blog\/?p=102381"},"modified":"2022-10-12T12:23:11","modified_gmt":"2022-10-12T12:23:11","slug":"program-of-the-month-sfkirmigsr","status":"publish","type":"post","link":"https:\/\/ahay.org\/blog\/2022\/10\/12\/program-of-the-month-sfkirmigsr\/","title":{"rendered":"Program of the month:  sfkirmigsr"},"content":{"rendered":"<p><a href=\"\/RSF\/sfkirmigsr.html\">sfkirmigsr<\/a> implements 2-D Kirchoff prestack depth migration (PSDM). <\/p>\n<p>The following example from <a href=\"\/RSF\/book\/tccs\/eikods\/marm.html\">tccs\/eikods\/marm<\/a> shows an application of <strong>sfkirmigsr<\/strong> to imaging synthetic <a href=\"\/RSF\/book\/data\/marmousi\/paper_html\/index.html\">Marmousi<\/a> data.<\/p>\n<p><img decoding=\"async\" src=\"\/RSF\/book\/tccs\/eikods\/marm\/Fig\/dmig2.png\" alt=\"\" title=\"\" \/><\/p>\n<p>With <strong>cig=<\/strong> flag, the program can output common-image gathers, as in the followung example from <a href=\"\/RSF\/book\/tccs\/time2depth2\/beinew.html\">tccs\/time2depth2\/beinew<\/a>:<\/p>\n<p><img decoding=\"async\" src=\"\/RSF\/book\/tccs\/time2depth2\/beinew\/Fig\/cig0.png\" alt=\"\" title=\"\" \/><\/p>\n<p>The traveltimes needed for Kirchhoff migration are computed externally and supplied in the form of traveltime tables <strong>stable=<\/strong> and <strong>rtable=<\/strong>. To increase accuracy, additional information can be provided by traveltime derivatives <strong>sderive=<\/strong> and <strong>rderiv=<\/strong>, as explained in the paper <a href=\"\/RSF\/book\/tccs\/eikods\/paper_html\/\"><br \/>\nKirchhoff migration using eikonal-based computation of traveltime source-derivatives<\/a>.<\/p>\n<p>Other useful parameters are <strong>antialias=<\/strong> (for controling antialiasing) and <strong>aperture=<\/strong> (for controling migration aperture).<\/p>\n<p>The program also has the adjoint flag <strong>adj=<\/strong>, which makes it suitable for least-squares inversion.<\/p>\n<h3 id=\"10previousprogramsofthemonth\">10 previous programs of the month:<\/h3>\n<ul>\n<li><a href=\"\/blog\/2019\/08\/10\/program-of-the-month-sfsnr2\/\">sfsnr2<\/a><\/li>\n<li><a href=\"\/blog\/2019\/07\/09\/program-of-the-month-sflpf\/\">sflpf<\/a><\/li>\n<li><a href=\"\/blog\/2019\/06\/12\/program-of-the-month-sfslice\/\">sfslice<\/a><\/li>\n<li><a href=\"\/blog\/2019\/06\/06\/program-of-the-month-sfzomig3\/\">sfzomig3<\/a><\/li>\n<li><a href=\"\/blog\/2017\/04\/19\/program-of-the-month-sfseislet\/\">sfseislet<\/a><\/li>\n<li><a href=\"\/blog\/2016\/02\/18\/program-of-the-month-sfmig2\/\">sfmig2<\/a><\/li>\n<li><a href=\"\/blog\/2016\/01\/16\/program-of-the-month-sfsort\/\">sfsort<\/a><\/li>\n<li><a href=\"\/blog\/2015\/12\/22\/program-of-the-month-sfdivn\/\">sfdivn<\/a><\/li>\n<li><a href=\"\/blog\/2015\/11\/16\/program-of-the-month-sfpldb-and-sfplas\/\">sfpldb and sfplas<\/a><\/li>\n<li><a href=\"\/blog\/2015\/10\/15\/program-of-the-month-sfisolr2\/\">sfisolr2<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>sfkirmigsr implements 2-D Kirchoff prestack depth migration (PSDM). The following example from tccs\/eikods\/marm shows an application of sfkirmigsr to imaging synthetic Marmousi data. With cig= flag, the program can output common-image gathers, as in the followung example from tccs\/time2depth2\/beinew: The traveltimes needed for Kirchhoff migration are computed externally and supplied in the form of traveltime [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-102381","post","type-post","status-publish","format-standard","hentry","category-programs"],"_links":{"self":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/102381","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/comments?post=102381"}],"version-history":[{"count":5,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/102381\/revisions"}],"predecessor-version":[{"id":107638,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/posts\/102381\/revisions\/107638"}],"wp:attachment":[{"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/media?parent=102381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/categories?post=102381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ahay.org\/blog\/wp-json\/wp\/v2\/tags?post=102381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}